Ball-bearing.



H. E. TIDNIAHSH.

BALL BEARING.

APPLICATION FILED MAY 3. |918.

1,296,021.. Patented @111.41919 2 SHEETS-SHEET I.

H. E. IIDMARSH.

ABALL BEARING.

APPUCATION FILED MAY 3.19l8.

Patented Mar. 4, 1919.

2 SHEETS-SHEET 2.

JNVENTOR. BY l' WR) To all 'whom t may concern.'

a OEBANGOR, mms, Assrenon. or cnn-r .Wonka A conroaarron 0F- 'To Union n 'machen Be it known 'that,I, HARRY E. TIDiuARsH, acitizen of theUnited States,.resid1nsg Bangor, in the county of Pen'o scot, tate of Maine, have invented certain newV and useful Improvements in Ball-Bearings; and' I do hereby declare the following to be a full, clear, 'and exact description of the invention, such as will enable otheis skilled in the art to which it appertains to make anduse the-same'.` v

This invention. relates to ball bea-rings, particularly ball bearings for shafts whlch are required to withstand largelateral. pressures. The invention is of special utility in ball bearin's forthe shafts of wood pulp grinders. These shafts are frequently as much as. nine inches in diameter and .when the grinders are in use, they -are subJected to pressures running up into many tons, so much thatl it is impractical to' make the shafts strong enough to av'oid lateral deiiection under the'v heavy pressures. Such deliec'tionuof a shaft under heavy pressure while'it. lis rotating produces a tendency to cause relative movement of the shaft and its bearings in-the direction of the length of the shaft. The present invention 1s directed to the provision of an improved construction for a ball bearin vfor such a shaft and particularlyone in w lch provision is made for guarding against and in fact precluding any relative movement of the parts of the bearing relative to the shaft in the dlrectlon of the axis ofthe shaft.

In accordance with the inv'ention, the shaft is provided with two ycircumferential grooves adapted to receive splitrings and the parts of the ball bearing are located between these rings and are positioned by them.by reason of the acting parts on the shaft which bear against the peripheries and the adjacent sides of the two split rin against the spllt rings are preferably sleeves provided with coacting threads. This perf' mits of placing. the two sleeves upon the shaft 'with one'of them inclosing 'and bear'- ing against the cprresponding ring, then placing the other rin inposltion', and then turning the two s eeves relatively so that their coactin threads cause them to move apart until t e'other sleeve is carried vinto hard engagement' with its corresponding ring. In thisway, the two sleeves may be drawings,

vlongitudinal section grooves 9. Each of structure including -inches in diameter.l employment of co- `parts of the bal b The partsl which -bear T upon the shaft in such a wa as to preclude any movement thereof axial u on the shaft except by turning them relrtiely on the shaft and Asuch turning movement may be efectually guarded agalnst by the employment of a set screw Y sleeve and engaging the shaft. The other parts of the ball bearing which-rotate with the shaft, including'the lnner ball race, may be mounted upon these sleevesin position to coact with the stationary parts of the bearing.

' The invention will be better understood by reference to the following description taken in connection with the accompanying which show the preferred embodiment of the invention. In these drawings,

' Figure 1 isa transverse section'through the shaft showing the .bearing in end elevation; F1g. 2 is a longitudinal section of the bearing; Fig. 3 isl a view of the shaft; Fig. l4 is a view of one of the split rings; Fig. 5 is a of one of the sleeves; Fig. 6 is a longitudinal section 'of the4 sleeve nut; and Fig. 7 is the other sleeve.

Referring to these drawings, the shaft 8 v is shown in Fig. 3 as having threads upon f'by which the grinder is mounted upon the shaft. In each the middle portion thereof end of the shaft are two circumferential these grooves is adapted to receive a split ring such as that shown at 10 in Fig. 4. The grooves arerelatively shallow so as not to weaken the shaft materially. I have found that a groove of a depth of one-quarter of an inch and a width of threequarters of an inch is adequate in a. a shaft measuring nine structure for the rotating earlng consists of two sleeves l1 and 412 shown 1n Figs. 5 and 7.

` The supportin hese two sleeves ing threads and they lie between the 4two rings 10, each of'the sleeves being provided with a circumferential ,recess at its end in which 'a ring 10 is received so that'the passing through the a longitudinal section of are provided with coact- ]Patented Mar. 4.191%. Application mea may 3. 191s. serial no. 232,199. .Y

sleeves inclose the rings and bear against the adjacent side walls "of the rings. The sleeve 11 is provided with a longitudinal key-way 13 which receives-a key 14 on thel shaft 8. This sleeve is also provided with a circumferential flange 15, the side of which forms a wall against which the inner ball race 16 is held. This' ball race ts tightly upon the sleeve llpand it is held in position upon the sleeve by a sleeve nut 17 (Fig. 6) provided with 1nternal threads adapted to engage external threads on the sleeve 11. When the ball racey 16 has been mounted in position, the nut 17 is screwed up upon the sleeve into hard engagement with the race 16 and it is then held in-position by a set screw 18 extending through a radial opening'in the nut engaging the sleeve 11.

he outer ball race is shown at 19 and the balls 20 lie between the two races. The outer ball race 19 is carried by a ring 21 which isA supported in position in any suitable manner, as by being provided with a bearing member 22 having a curved surface l adapted to be received in a correspondingly shaped depression in a suitable pillow block. The sides of the ball race are closed by annularflanges 23 secured to the ring 21 v and provided with anges 24, corres onding to overlapping flanges on the ange 15 Yof sleeve 11 and a similarly shaped flange on the nut 17. Packing collars 25 are secured to the annular flanges 23 by bolts 26. These collars 25 have their 'interior surfaces in whic 'suitable packing 27 is located, vthese packing rings being arranged to bear upon the surfaces of the sleeve 11 and nut 17 in the manner indicated in Fig. 2. a

1n assembling the parts thus constructed, the ring 10 with which the sleeve -11 coacts, is first placed in position in its groove'9 and the sleeve 11 is then moved along' upon the shaft 8 until it incloses the ring 10 within the circumferential recess at the end of the sleeve. Certain of the cparts, including the inner ball race 16 and nut 17 may be as- 4 sembled upon the sleeve 11 before the latter is placed upon the shaft 8. -The sleeve 12 lis then moved along upon the shaft to cause its threads. to engage the threads of the sleeve 11 and then the two sleeves are rotated relatively until the sleeve 12 is car-l ried beyond the groove 9 in shaft 8 for the ring with which the sleeve 12 coacts.

This ring is then placed in position inits groove 9. This having been done, the sleeve 12 is turned in the opposite direction upon the sleeve 11, moving it back in the direction of the axis of the sleeve until it incloses its ring 10 in thefcircumferenti'al'recess of the sleeve. The turning movement of sleeve 12 relative to'slereve 11 is continued v until the two sleeves are carried into hard engagement with the adjacent faces of the two rings 10 projecting beyond the periphery of the shaft 8. The two sleeves having been located thus, they are locked tothe shaft 8 so as to preclude rotational movementthereof relatively lto the shaft. The key and key-wayv 14 and 13 serve to prevent relative rotation of sleeve 11 -upon ooves onthe shaftf'a'nd rotation of' sleeve 12 upon the shaft may be eHectively guarded against by the provision of one or more set 'screws 28 'threaded into radial openings inl the engagement of the sleeves with the adj acent faces'of'the rings 10:

By this construction' the pants of `the ball bearing are definitely located with respect to the length of the shaft so that any relative movement of the bearing andthe shaft in the direction of :the length of the shaft is rendered im sible. The two rings' 10 fit snugly in thelr grooves in the shaft and the supporting structure of the bearing is then extended in the direction of the length of theshaft until it is carried into hard engagement with the adjacent faces of these rings. The-construction is therefore specially well adaptedy for use in bearvingsfor the shaft of a wood pulp grinder wherein4 the shaft and bearings are subjected to veryl severe stresses resulting in continual lateral flexure of the shaft under the pressure with which the wood to be ground is forced into contact with the grinder carried by the shaft.

1. Ina ball bearing, the combination of a shaft having two circumferential grooves therein, rings in the grooves, two sleeves on the shaft between the rings having threaded engagement with each other and each provided with a circumferential recess at its end in which the portion of one of the rings projecting beyond the surface of the shaft' is received, a ball race mounted on one of the sleeves, a second ball race, balls between the two races, and means for supporting the outer ball race; substantially as described. f

2. A ball lbearin comprising the ycombination of a shaft aving two circumferential grooves therein, rings in the two grooves projecting beyond the surface of the shaft, two sleeves on the shaft having threaded engagement with each other and each rovided' with a circumferential .recess within which the portion of one of the rings projecting beyond the surfacey of the shaft is received, means for preventing rotation of the sleeves upon the sha-ft, a circumferential flange 'on' one of the sleeves, a ball race on the sleeve abuttin against the flange, a nut threaded on the s eeve and engaging the ball race, means for preventi'ng rotation of the nut upon the sleeve, a'n

3. In a' ball bearing,- the combination of a shaft having two circumferential grooves, rings located 1n the grooves and projecting beyond the surface of the shaft, a pair of threaded sleeves on the shaft between the two rings having threaded engagement with each other and each provided with a circumferential recess at its end within which the portion of a ring projecting beyond the 10 surface of Ithe shaft is received, means for preventing rotation of the sleeves upon the shaft, a flange on one of the sleeves, a ball race on said sleeve, a nut threaded on said vsleeve for holding the race between it and the flange, an outer ball race, balls between the races, and annular members secured to the outer -ball race, lying on opposite sides of the balls and coacting with parts rotatsubstantially as de- 

